The SLD-1550-9MM from Nolatech is a Superluminescent Diode with Wavelength 1510 to 1550 nm, Output Power 0.2 to 10 mW, Bandwidth (FWHM) 30 to 35 nm, Forward Voltage 2.5 V, Forward Current 250 to 400 mA. More details for SLD-1550-9MM can be seen below.